Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e76bcf421126f59…

MALICIOUS

PDF

60.2 KB Created: 2020-11-11 05:24:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 109ece573e0b997839958a933d33c60a SHA-1: a487a37873ff22466c47c5f3c1a749346d4452b9 SHA-256: 1e76bcf421126f5985f5a4e6c0c6a6908e8d2971f665157ec6b02970c4430005
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the presence of numerous external links suggest a link farm or phishing attempt. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely used to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffmen.ru/aws?keyword=touchtunes+jukebox+hacks In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f9416e753f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f8c02c7e818d.pdfIn PDF document text
    • https://xokafewapi.weebly.com/uploads/1/3/4/4/134488510/6791621.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/6497588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c6aa1e-e1b4-4caf-a5e2-b01b107ea49c/6651382648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a74c79e6-2577-419d-9615-2fffbb1e5e11/romokolikerinuli.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/67113566056.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/biology_questions_form_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/lock_ridge_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/338be38b-9d28-4ce7-8f5f-1c7209bb1fdf/lebegilewizusoririvaga.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/57546761052.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/core_connection_course_3_answer_key_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c5c0fae-1e76-4dfe-81c7-a295d0c2a9fa/watch_joker_2019_online_reddit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB13E 5056 bytes
SHA-256: 4b748bfc1fa1208663d842d9a2a064ee642b3fd01dc7e8ef4ccdb8cd3306af0b
font_01_sfnt_off0000c276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC276 9888 bytes
SHA-256: acb37518fa2807d2c7f34a3f21e23892a1d46dd4b6d760ca1eca2b11c5940ca1

Open this report in the interactive analyzer, or submit your own file for analysis.